Arsene Amulet

The ring should fit snugly into place, though I recommend using a small drop of glue.

I used this chain generator by sal for the necklace portion of the amulet.
https://www.thingiverse.com/thing:28405/files

Included a split link that can be used to patch the chain with a bit of glue (on my first print a couple links in the middle misprinted and I didn't want to scrap the whole thing)